激光重熔Ni60合金涂层实验研究
Experimental Research on Ni60 Alloy Coating Prepared by Laser Surface Remelting
杨炎川, 崔琳珠
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作者单位：徐州机电工程高等职业学校 焊接技术自动化系, 江苏 徐州 221000
中文关键字：热喷涂； 激光重熔； 显微组织； 硬度
英文关键字：flame spraying; laser surface remelting; microstructure; hardness
中文摘要：采用热喷涂+激光重熔工艺，在Q235低碳钢板上制备了Ni60涂层，对涂层微观组织、硬度分布规律进行了分析。 结果表明：涂层经过激光重熔后， 外观质量良好，无裂纹缺陷，其组织组成物包括γ-Ni固溶体、碳化物、硼化物+γ -固溶体的弥散共晶体，与基体之间以冶金方式结合；涂层的平均硬度达到375 HV0.2，是基体的2～3倍。
英文摘要：Ni60 coating formed on the surface of Q235 steel was obtained by a combined flame spraying and laser surface remelting process. The microstructure and microhardness of the coating were analyzed. The results show that the appearance quality of the coating after laser remelting is good and has not cracks. The coating microstructure is mainly composed of γ-Ni solid solution, boride, carbide+γ-solid solution eutectic. There is an excellent metallurgical bonding between the coating and the substrate. The microhardness of the coating is 375 HV0.2, which is 2～3 times higher than that of the substrate.